RE: 32bit and 64bit

  • From: "Chris Hallsworth" <christopherh40@xxxxxxxxxxxxxx>
  • To: <jfw@xxxxxxxxxxxxx>
  • Date: Wed, 11 Nov 2009 22:49:28 -0000

Even I don't understand half of what 64 bit does for me. All I know is that
my Windows 7 64 bit installation runs a snap. I have 4GB of RAM so can take
advantage of 64 bit. But that's all I know! So I'm proud of you there Joseph

-----Original Message-----
From: jfw-bounce@xxxxxxxxxxxxx [mailto:jfw-bounce@xxxxxxxxxxxxx] On Behalf
Of Joseph Lee
Sent: 11 November 2009 10:29 PM
To: jfw@xxxxxxxxxxxxx
Subject: RE: 32bit and 64bit


Well, memory isn't the only one.

As many people have said, 64-bit means that we can use more than 4 GB of RAM
on a computer. Currently, the CPU family of today supports up to one
terabyte (40-bit) of memory (well, the designers at AMD, the originator of
modern 64-bit in the form of X64 thought that 1 TB is sufficient for now).

As for security, there is a new feature on the 64-bit called "Execute
Disable." This means that a portion of memory that is set to "read-only"
cannot be run by a code (sorry, somewhat hard to explain this concept).

There are other enhancements besides these two.

As for compatibility of 64-bit with JAWS, you cannot run a 32-bit version of
JAWS on a 64-bit computer. This is because the 64-bit computers (more
specifically, thye operating system) uses different driver model. So, a
32-bit version of JAWS with a 32-bit drivers on a 64-bit driver model will
not take advantage of newer features of 64-bit machines. Nor using 64-bit
version of JAWS on a 32-bit model.

Well, 64-bit and 32-bit is somewhat hard to explain in plain language. This
is as so far as I can go. Sorry if some of the materials were hard to


Joseph P.S. Good thing that I am majoring in computer science instead of
computer engineering.


From: jfw-bounce@xxxxxxxxxxxxx [mailto:jfw-bounce@xxxxxxxxxxxxx] On Behalf
Of Daniel McGee
Sent: Wednesday, November 11, 2009 2:21 PM
To: jfw@xxxxxxxxxxxxx
Subject: 32bit and 64bit 


Hello everyone, I just wanted to know what is the difference between a 32bit
computer and a 64bit one? I heard this on the what's new pordcast of jaws 11
and I looked on the internet but I didn't understand what it ment. Is it
something to do with memory or something? A plain simple expermation will be
greatful! However I don't mind if some of you want to get a little
technical. Just give me the simple basic differences before launching into
technical details about the two different numbers!

Many Thanks 


No virus found in this incoming message.
Checked by AVG -
Version: 8.5.425 / Virus Database: 270.14.60/2496 - Release Date: 11/11/09

JFW related links:
JFW homepage:
Scripting mailing list:
JFW List instructions:
To post a message to the list, send it to jfw@xxxxxxxxxxxxx
To unsubscribe from this mailing list, send a message to 
jfw-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.
Archives located at: //
Alternative archives located at:

If you have any concerns about the list, post received from the list, or the 
way the list is being run, do not post them to the list. Rather contact the 
list owner at jfw-admins@xxxxxxxxxxxxxx

Other related posts: